Both parents of a blue-eyed man are brown-eyed (Brown
is dominant). This man
marries a brown-eyed woman
who had a brown-eyed
mother, blue-eyed father, and
a brown-eyed brother. The
man and woman in this
question have a brown-eyed
child. Answer the following:
(Use “B” and “b” alleles)

During crossing-over, a. genetic material is exchanged between nonsister chromatids, resulting in new combinations of alleles. b. nonsister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. c. one homologous chromosome of a tetrad is exchanged with another tetrad, resulting in new combinations of alleles. d. sister chromatids from each homologous chromosome of a tetrad are exchanged, resulting in new combinations of alleles. e. genetic material is exchanged between sister chromatids, resulting in new combinations of alleles.